I'm writing to ask if someone as a graph for Spain & Portugal that includes the regions? Or if they a have a procedure or tutorial how to do it.
Perhaps this will get you started.
I've done that before for Spain, you'll have to figure out to which level you want to delineate (Comunidad Autonoma/ provincia/comarca/municipio..) I've had good success downloading the shapefiles from here: Download | Global Administrative Areas Once you have that downloaded, you can follow the instructions in LouV's post on how to create the zones from the shapefile (basically you need the dbf file which contains all the info for naming and the shp file which contains each of the shapes for each region). Let me know if you need more help once you have the dbf and the shp files on how to create the custom map